Components on floor

You should be ok as long as you use some type of isolation under each unit. Springs much preferred or at the very least soborthane. No spikes! Anything place directly on the floor, regardless of floor material, will be an invitation for unwanted vibrations.

It shouldn't cause any negative problems.  The installation method of your floor will determine exactly how prone it is to external vibration, but its mass is quite high compared to shelves or racks.  It would take high amounts of energy to get the floor moving.

nothing to worry about outside of tripping over wires if not managed well